httpnnewsnavercomarticle4210006327676sid=104 
The Japanese archaeological community was disappointed when the inkstone, which is believed to be ancient Japan, was found to match the ingredients of the oil pen
According to the Yomiuri Shimbun and NHK on the 9th,
It was reported that the letters of the excavation of the Tawayama ruins in Matsue, Shimane Prefecture, which was announced to be the oldest in Japan, matched the ingredients of the oil pen on the market
You developed a oil pen a long time ago
Shaking. Shaking